I think the kids receiving tutoring at our school are the ones having significant learning issues. As I said, I would be fine with this as an after school activity and can see where it would be an opportunity for personal growth, but during school, I would rather that my child learn academics. If he's done with his assignment, give him advanced work. You know what I mean?
No, I honestly don't. Or rather, I do. Its what my dad wanted for me.

As I've mentioned in other posts, I ended up doing so much extra work that smart person that I am, I was burnt-out on school by the time college came around and I still have yet to get my degree.
I ended up being so far ahead of my peers academically, I was alienated as a child. I would end up doing advanced work, but since I was still going through the grades, it did not give me an advantage over my peers. Sure, I knew more than they did, but I still had to do the same work they did - I just finished it sooner and had even more free time. Or time to be incredibly bored as by the beginning of 3rd grade I had read all the books that interested me in the school library.
As someone who has worked with kids in a classroom, I would not give more advanced work for the similar reasons. The child has done what I have asked of them, I'm not going to go "Oh good, you finished this - here's more work that is harder than that for you to do to reward your achievement." Nope. I'm going to go "Good job, now read quietly at your desk." Or some other form of reward. It's ridiculous to tell a kid that because he finished his work he has to do more advanced work. After awhile, he'll just dawdle on his assignment so he doesn't have to do more work than his peers.
My parents (both teachers) hated the honors classes I had in middle school because they worked on that basic principle. Just mix the kids because it doesn't matter - the gifted kids are smarter, so just give them more work.

Great way to burnout kids. Kids who aren't stupid and know that if they just work more slowly and wait to turn their paper in, they won't have to do more work.
It's not like by tutoring he wouldn't be doing work. He'd be explaining the work to his peers. It wouldn't be *book* learning, but he would still be learning valuable lessons that would prepare him for the real world, which is what most parents expect school to do.